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melting problem: looking for appropriate solvers

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Old   September 11, 2019, 22:43
Question Moisture evaporation - if-else loop
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Kumaresh
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Hello Luca,
In previous message, I have given a condition for moisture evaporation (phase change) quoted in a box.
Quote:
CONDITION: T= 100 ==> moisture content =0
Based on it, mass and heat balances are calculated at the boiling plane (surface) as,
Mass balance (r) = rho * alpha * (dx/dt) [kg/m2.s]
Heat balance (-K dT/dx) = (r) * latent heat [W/m2]
I tried to evaluate the above condition separately. I mean, without pyrolysis, only phase change, in order to understand that how such condition can be implemented in the OpenFOAM.
I'm hereby attaching the solver (OF211). In this solver, under TEqn.H, I solved a if-else loop based on the above condition.
Quote:
forAll(mesh.cells(), celli)
{
if (T[celli] >= Tsat.value())
{
alpha[celli] = scalar(0.0);
}
else
{
alpha[celli] = alphaTemp[celli];
// alpha[celli] = alpha[celli];
// alpha[celli] = alpha[nearestCellIndex];
}
}
However, the alpha (moisture content) is not solved properly with appropriate outcome. In my case, alpha has no expression (field operation), alpha is only solved based on the loop. So, do we need an expression to solve alpha basically? any ideas ?

If you have any ideas about it, kindly do share.

It will be helpful. Thank you
Attached Files
File Type: gz Boiling_solver.tar.gz (156.7 KB, 2 views)
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